/*
 * Copyright (c) 2010-2020 Nathan Rajlich
 *
 *  Permission is hereby granted, free of charge, to any person
 *  obtaining a copy of this software and associated documentation
 *  files (the "Software"), to deal in the Software without
 *  restriction, including without limitation the rights to use,
 *  copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following
 *  conditions:
 *
 *  The above copyright notice and this permission notice shall be
 *  included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *  OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *  OTHER DEALINGS IN THE SOFTWARE.
 */

package org.java_websocket.util;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class SocketUtil {

    public static int getAvailablePort() throws InterruptedException {
        while (true) {
            try (ServerSocket srv = new ServerSocket(0)) {
                return srv.getLocalPort();
            } catch (IOException e) {
                // Retry
            }
            Thread.sleep(5);
        }
    }
    public static boolean waitForServerToStart(int port) throws InterruptedException {
        Socket socket = null;
        for (int i = 0; i < 50; i++) {
            try {
                socket = new Socket("localhost", port);
                if (socket.isConnected()) {
                    return true;
                }
            } catch (IOException ignore) {
                // Ignore
            } finally {
                if (socket != null) {
                    try {
                        socket.close();
                    } catch (IOException ignore) {
                    }
                }
            }
            Thread.sleep(10);
        }
        return false;
    }
}
